S
M
T
W
T
F
S
26
85°
71°
27
88°
69°
28
87°
68°
29
86°
70°
30
88°
72°
31
85°
68°
1
85°
72°
2
88°
73°
3
89°
69°
4
90°
68°
5
85°
69°
6
84°
70°
7
85°
68°
8
85°
67°
9
86°
67°
10
85°
70°
11
86°
71°
12
87°
71°
13
87°
70°
14
86°
71°
15
89°
71°
16
89°
66°
17
88°
66°
18
84°
67°
19
84°
70°
20
86°
65°
21
86°
65°
22
85°
66°
23
84°
69°
24
87°
68°
25
88°
67°
26
88°
65°
27
87°
63°
28
83°
63°
29
81°
64°
30
82°
64°
31
84°
66°
1
86°
68°
2
86°
68°
3
87°
67°
4
86°
68°
5
86°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Northampton
Northampton's August 2026 forecast shows daily high temperatures ranging from 81° to 90°, with overnight lows between 63° and 73°. The average high for August is 86° with an average low of 68°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Northampton. See also: September | October | November.